Nitrogen-Doped Carbon Dots Modified Fe-Co Sulfide Nanosheets as High-Efficiency Electrocatalysts toward Oxygen Evolution Reaction.

Developing high-efficiency and stable oxygen evolution reaction (OER) electrocatalysts is an imperative requirement to produce green and clean hydrogen energy. In this work, the FeCoS /NCDs composite with nitrogen-doped carbon dots (NCDs) modified Fe-Co sulfide (FeCoS ) nanosheets is prepared by using a facile and mild one-pot solvothermal method. Benefiting from the low crystallinity and the synergistic effect between FeCoS and NCDs, the optimal FeCoS /NCDs-3 composite exhibits an overpotential of only 284 mV at 10 mA cm , a small Tafel value of 52.